My user has 2 applications that work independently, but have a similar metadata. If he updates one of the applications (he usually adds 3 o 4 accounts per months), he has to update the other application too (both manually). Is there any way to automatize this process with FDM? If not, is there another way to do it?
Thank you!

Your question is a little unclear. Are talking about FDM updating HFM metadata or synchronizing maps across FDM applications?

In terms of metadata, FDM does not load metadata. ERPi can load metadata but it is unclear from your question if you are using ERPi.

My answer to the latter is that if you are skilled enough in VBScript as well the FDM application, most anything is possible. If this is the question you are asking and are unsure of how to accomplish this, I would suggest that you reach out to a qualified partner to help you implement this.